/* $Id: server.cpp 29385 2010-05-11 18:05:44Z vboxsync $ */ /** @file * XPCOM server process (VBoxSVC) start point. */ /* * Copyright (C) 2006-2009 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ #include #include #include #ifdef XPCOM_GLUE # include #endif #include #include #include "xpcom/server.h" #include "Logging.h" #include #include #include #include #include #include #include #include #include #include #include // for the signal handler #include #include #include #include #include #include ///////////////////////////////////////////////////////////////////////////// // VirtualBox component instantiation ///////////////////////////////////////////////////////////////////////////// #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "DHCPServerRunner.h" #include "DHCPServerImpl.h" #ifdef VBOX_WITH_USB # include # include #endif #include #include #include /* implement nsISupports parts of our objects with support for nsIClassInfo */ NS_DECL_CLASSINFO(VirtualBox) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VirtualBox, IVirtualBox) NS_DECL_CLASSINFO(Machine) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Machine, IMachine) NS_DECL_CLASSINFO(VFSExplorer) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VFSExplorer, IVFSExplorer) NS_DECL_CLASSINFO(Appliance) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Appliance, IAppliance) NS_DECL_CLASSINFO(VirtualSystemDescription) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VirtualSystemDescription, IVirtualSystemDescription) NS_DECL_CLASSINFO(SessionMachine) NS_IMPL_THREADSAFE_ISUPPORTS2_CI(SessionMachine, IMachine, IInternalMachineControl) NS_DECL_CLASSINFO(SnapshotMachine) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SnapshotMachine, IMachine) NS_DECL_CLASSINFO(Snapshot) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Snapshot, ISnapshot) NS_DECL_CLASSINFO(Medium) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Medium, IMedium) NS_DECL_CLASSINFO(MediumFormat) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(MediumFormat, IMediumFormat) NS_DECL_CLASSINFO(MediumAttachment) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(MediumAttachment, IMediumAttachment) NS_DECL_CLASSINFO(Progress) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Progress, IProgress) NS_DECL_CLASSINFO(CombinedProgress) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(CombinedProgress, IProgress) NS_DECL_CLASSINFO(SharedFolder) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SharedFolder, ISharedFolder) #ifdef VBOX_WITH_VRDP NS_DECL_CLASSINFO(VRDPServer) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(VRDPServer, IVRDPServer) #endif NS_DECL_CLASSINFO(Host) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(Host, IHost) NS_DECL_CLASSINFO(HostNetworkInterface) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(HostNetworkInterface, IHostNetworkInterface) NS_DECL_CLASSINFO(DHCPServer) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(DHCPServer, IDHCPServer) NS_DECL_CLASSINFO(GuestOSType) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(GuestOSType, IGuestOSType) NS_DECL_CLASSINFO(NetworkAdapter) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(NetworkAdapter, INetworkAdapter) NS_DECL_CLASSINFO(NATEngine) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(NATEngine, INATEngine) NS_DECL_CLASSINFO(SerialPort) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SerialPort, ISerialPort) NS_DECL_CLASSINFO(ParallelPort) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(ParallelPort, IParallelPort) NS_DECL_CLASSINFO(USBController) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(USBController, IUSBController) NS_DECL_CLASSINFO(StorageController) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(StorageController, IStorageController) #ifdef VBOX_WITH_USB NS_DECL_CLASSINFO(USBDeviceFilter) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(USBDeviceFilter, IUSBDeviceFilter) NS_DECL_CLASSINFO(HostUSBDevice) NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HostUSBDevice, IUSBDevice, IHostUSBDevice) NS_DECL_CLASSINFO(HostUSBDeviceFilter) NS_IMPL_THREADSAFE_ISUPPORTS2_CI(HostUSBDeviceFilter, IUSBDeviceFilter, IHostUSBDeviceFilter) #endif NS_DECL_CLASSINFO(AudioAdapter) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(AudioAdapter, IAudioAdapter) NS_DECL_CLASSINFO(SystemProperties) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(SystemProperties, ISystemProperties) #ifdef VBOX_WITH_RESOURCE_USAGE_API NS_DECL_CLASSINFO(PerformanceCollector) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(PerformanceCollector, IPerformanceCollector) NS_DECL_CLASSINFO(PerformanceMetric) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(PerformanceMetric, IPerformanceMetric) #endif /* VBOX_WITH_RESOURCE_USAGE_API */ NS_DECL_CLASSINFO(BIOSSettings) NS_IMPL_THREADSAFE_ISUPPORTS1_CI(BIOSSettings, IBIOSSettings) //////////////////////////////////////////////////////////////////////////////// enum { /* Delay before shutting down the VirtualBox server after the last * VirtualBox instance is released, in ms */ VBoxSVC_ShutdownDelay = 5000 }; static bool gAutoShutdown = false; static nsIEventQueue *gEventQ = nsnull; static PRBool volatile gKeepRunning = PR_TRUE; ///////////////////////////////////////////////////////////////////////////// /** * Simple but smart PLEvent wrapper. * * @note Instances must be always created with operator new! */ class MyEvent { public: MyEvent() { mEv.that = NULL; }; /** * Posts this event to the given message queue. This method may only be * called once. @note On success, the event will be deleted automatically * after it is delivered and handled. On failure, the event will delete * itself before this method returns! The caller must not delete it in * either case. */ nsresult postTo(nsIEventQueue *aEventQ) { AssertReturn(mEv.that == NULL, NS_ERROR_FAILURE); AssertReturn(aEventQ, NS_ERROR_FAILURE); nsresult rv = aEventQ->InitEvent(&mEv.e, NULL, eventHandler, eventDestructor); if (NS_SUCCEEDED(rv)) { mEv.that = this; rv = aEventQ->PostEvent(&mEv.e); if (NS_SUCCEEDED(rv)) return rv; } delete this; return rv; } virtual void *handler() = 0; private: struct Ev { PLEvent e; MyEvent *that; } mEv; static void *PR_CALLBACK eventHandler(PLEvent *self) { return reinterpret_cast(self)->that->handler(); } static void PR_CALLBACK eventDestructor(PLEvent *self) { delete reinterpret_cast(self)->that; } }; //////////////////////////////////////////////////////////////////////////////// /** * VirtualBox class factory that destroys the created instance right after * the last reference to it is released by the client, and recreates it again * when necessary (so VirtualBox acts like a singleton object). */ class VirtualBoxClassFactory : public VirtualBox { public: virtual ~VirtualBoxClassFactory() { LogFlowFunc(("Deleting VirtualBox...\n")); FinalRelease(); sInstance = NULL; LogFlowFunc(("VirtualBox object deleted.\n")); RTPrintf("Informational: VirtualBox object deleted.\n"); } NS_IMETHOD_(nsrefcnt) Release() { /* we overload Release() to guarantee the VirtualBox destructor is * always called on the main thread */ nsrefcnt count = VirtualBox::Release(); if (count == 1) { /* the last reference held by clients is being released * (see GetInstance()) */ PRBool onMainThread = PR_TRUE; if (gEventQ) gEventQ->IsOnCurrentThread(&onMainThread); PRBool timerStarted = PR_FALSE; /* sTimer is null if this call originates from FactoryDestructor()*/ if (sTimer != NULL) { LogFlowFunc(("Last VirtualBox instance was released.\n")); LogFlowFunc(("Scheduling server shutdown in %d ms...\n", VBoxSVC_ShutdownDelay)); /* make sure the previous timer (if any) is stopped; * otherwise RTTimerStart() will definitely fail. */ RTTimerLRStop(sTimer); int vrc = RTTimerLRStart(sTimer, uint64_t(VBoxSVC_ShutdownDelay) * 1000000); AssertRC(vrc); timerStarted = SUCCEEDED(vrc); } else { LogFlowFunc(("Last VirtualBox instance was released " "on XPCOM shutdown.\n")); Assert(onMainThread); } if (!timerStarted) { if (!onMainThread) { /* Failed to start the timer, post the shutdown event * manually if not on the main thread alreay. */ ShutdownTimer(NULL, NULL, 0); } else { /* Here we come if: * * a) gEventQ is 0 which means either FactoryDestructor() is called * or the IPC/DCONNECT shutdown sequence is initiated by the * XPCOM shutdown routine (NS_ShutdownXPCOM()), which always * happens on the main thread. * * b) gEventQ has reported we're on the main thread. This means * that DestructEventHandler() has been called, but another * client was faster and requested VirtualBox again. * * In either case, there is nothing to do. * * Note: case b) is actually no more valid since we don't * call Release() from DestructEventHandler() in this case * any more. Thus, we assert below. */ Assert(gEventQ == NULL); } } } return count; } class MaybeQuitEvent : public MyEvent { /* called on the main thread */ void *handler() { LogFlowFunc(("\n")); Assert(RTCritSectIsInitialized(&sLock)); /* stop accepting GetInstance() requests on other threads during * possible destruction */ RTCritSectEnter(&sLock); nsrefcnt count = 0; /* sInstance is NULL here if it was deleted immediately after * creation due to initialization error. See GetInstance(). */ if (sInstance != NULL) { /* Release the guard reference added in GetInstance() */ count = sInstance->Release(); } if (count == 0) { if (gAutoShutdown) { Assert(sInstance == NULL); LogFlowFunc(("Terminating the server process...\n")); /* make it leave the event loop */ gKeepRunning = PR_FALSE; } } else { /* This condition is quite rare: a new client happened to * connect after this event has been posted to the main queue * but before it started to process it. */ LogFlowFunc(("Destruction is canceled (refcnt=%d).\n", count)); } RTCritSectLeave(&sLock); return NULL; } }; static void ShutdownTimer(RTTIMERLR hTimerLR, void *pvUser, uint64_t /*iTick*/) { NOREF(hTimerLR); NOREF(pvUser); /* A "too late" event is theoretically possible if somebody * manually ended the server after a destruction has been scheduled * and this method was so lucky that it got a chance to run before * the timer was killed. */ AssertReturnVoid(gEventQ); /* post a quit event to the main queue */ MaybeQuitEvent *ev = new MaybeQuitEvent(); nsresult rv = ev->postTo(gEventQ); NOREF(rv); /* A failure above means we've been already stopped (for example * by Ctrl-C). FactoryDestructor() (NS_ShutdownXPCOM()) * will do the job. Nothing to do. */ } static NS_IMETHODIMP FactoryConstructor() { LogFlowFunc(("\n")); /* create a critsect to protect object construction */ if (RT_FAILURE(RTCritSectInit(&sLock))) return NS_ERROR_OUT_OF_MEMORY; int vrc = RTTimerLRCreateEx(&sTimer, 0, 0, ShutdownTimer, NULL); if (RT_FAILURE(vrc)) { LogFlowFunc(("Failed to create a timer! (vrc=%Rrc)\n", vrc)); return NS_ERROR_FAILURE; } return NS_OK; } static NS_IMETHODIMP FactoryDestructor() { LogFlowFunc(("\n")); RTTimerLRDestroy(sTimer); sTimer = NULL; RTCritSectDelete(&sLock); if (sInstance != NULL) { /* Either posting a destruction event falied for some reason (most * likely, the quit event has been received before the last release), * or the client has terminated abnormally w/o releasing its * VirtualBox instance (so NS_ShutdownXPCOM() is doing a cleanup). * Release the guard reference we added in GetInstance(). */ sInstance->Release(); } return NS_OK; } static nsresult GetInstance(VirtualBox **inst) { LogFlowFunc(("Getting VirtualBox object...\n")); RTCritSectEnter(&sLock); if (!gKeepRunning) { LogFlowFunc(("Process termination requested first. Refusing.\n")); RTCritSectLeave(&sLock); /* this rv is what CreateInstance() on the client side returns * when the server process stops accepting events. Do the same * here. The client wrapper should attempt to start a new process in * response to a failure from us. */ return NS_ERROR_ABORT; } nsresult rv = NS_OK; if (sInstance == NULL) { LogFlowFunc (("Creating new VirtualBox object...\n")); sInstance = new VirtualBoxClassFactory(); if (sInstance != NULL) { /* make an extra AddRef to take the full control * on the VirtualBox destruction (see FinalRelease()) */ sInstance->AddRef(); sInstance->AddRef(); /* protect FinalConstruct() */ rv = sInstance->FinalConstruct(); RTPrintf("Informational: VirtualBox object created (rc=%Rhrc).\n", rv); if (NS_FAILED(rv)) { /* On failure diring VirtualBox initialization, delete it * immediately on the current thread by releasing all * references in order to properly schedule the server * shutdown. Since the object is fully deleted here, there * is a chance to fix the error and request a new * instantiation before the server terminates. However, * the main reason to maintain the shoutdown delay on * failure is to let the front-end completely fetch error * info from a server-side IVirtualBoxErrorInfo object. */ sInstance->Release(); sInstance->Release(); Assert(sInstance == NULL); } else { /* On success, make sure the previous timer is stopped to * cancel a scheduled server termination (if any). */ RTTimerLRStop(sTimer); } } else { rv = NS_ERROR_OUT_OF_MEMORY; } } else { LogFlowFunc(("Using existing VirtualBox object...\n")); nsrefcnt count = sInstance->AddRef(); Assert(count > 1); if (count == 2) { LogFlowFunc(("Another client has requested a reference to VirtualBox, canceling detruction...\n")); /* make sure the previous timer is stopped */ RTTimerLRStop(sTimer); } } *inst = sInstance; RTCritSectLeave(&sLock); return rv; } private: /* Don't be confused that sInstance is of the *ClassFactory type. This is * actually a singleton instance (*ClassFactory inherits the singleton * class; we combined them just for "simplicity" and used "static" for * factory methods. *ClassFactory here is necessary for a couple of extra * methods. */ static VirtualBoxClassFactory *sInstance; static RTCRITSECT sLock; static RTTIMERLR sTimer; }; VirtualBoxClassFactory *VirtualBoxClassFactory::sInstance = NULL; RTCRITSECT VirtualBoxClassFactory::sLock; RTTIMERLR VirtualBoxClassFactory::sTimer = NIL_RTTIMERLR; NS_GENERIC_FACTORY_SINGLETON_CONSTRUCTOR_WITH_RC(VirtualBox, VirtualBoxClassFactory::GetInstance) //////////////////////////////////////////////////////////////////////////////// typedef NSFactoryDestructorProcPtr NSFactoryConsructorProcPtr; /** * Enhanced module component information structure. * * nsModuleComponentInfo lacks the factory construction callback, here we add * it. This callback is called by NS_NewGenericFactoryEx() after a * nsGenericFactory instance is successfully created. */ struct nsModuleComponentInfoEx : nsModuleComponentInfo { nsModuleComponentInfoEx() {} nsModuleComponentInfoEx(int) {} nsModuleComponentInfoEx( const char* aDescription, const nsCID& aCID, const char* aContractID, NSConstructorProcPtr aConstructor, NSRegisterSelfProcPtr aRegisterSelfProc, NSUnregisterSelfProcPtr aUnregisterSelfProc, NSFactoryDestructorProcPtr aFactoryDestructor, NSGetInterfacesProcPtr aGetInterfacesProc, NSGetLanguageHelperProcPtr aGetLanguageHelperProc, nsIClassInfo ** aClassInfoGlobal, PRUint32 aFlags, NSFactoryConsructorProcPtr aFactoryConstructor) { mDescription = aDescription; mCID = aCID; mContractID = aContractID; mConstructor = aConstructor; mRegisterSelfProc = aRegisterSelfProc; mUnregisterSelfProc = aUnregisterSelfProc; mFactoryDestructor = aFactoryDestructor; mGetInterfacesProc = aGetInterfacesProc; mGetLanguageHelperProc = aGetLanguageHelperProc; mClassInfoGlobal = aClassInfoGlobal; mFlags = aFlags; mFactoryConstructor = aFactoryConstructor; } /** (optional) Factory Construction Callback */ NSFactoryConsructorProcPtr mFactoryConstructor; }; //////////////////////////////////////////////////////////////////////////////// static const nsModuleComponentInfoEx components[] = { nsModuleComponentInfoEx( "VirtualBox component", (nsCID) NS_VIRTUALBOX_CID, NS_VIRTUALBOX_CONTRACTID, VirtualBoxConstructor, // constructor funcion NULL, // registration function NULL, // deregistration function VirtualBoxClassFactory::FactoryDestructor, // factory destructor function NS_CI_INTERFACE_GETTER_NAME(VirtualBox), NULL, // language helper &NS_CLASSINFO_NAME(VirtualBox), 0, // flags VirtualBoxClassFactory::FactoryConstructor // factory constructor function ) }; ///////////////////////////////////////////////////////////////////////////// /** * Extends NS_NewGenericFactory() by immediately calling * nsModuleComponentInfoEx::mFactoryConstructor before returning to the * caller. */ nsresult NS_NewGenericFactoryEx(nsIGenericFactory **result, const nsModuleComponentInfoEx *info) { AssertReturn(result, NS_ERROR_INVALID_POINTER); nsresult rv = NS_NewGenericFactory(result, info); if (NS_SUCCEEDED(rv) && info && info->mFactoryConstructor) { rv = info->mFactoryConstructor(); if (NS_FAILED(rv)) NS_RELEASE(*result); } return rv; } ///////////////////////////////////////////////////////////////////////////// /** * Helper function to register self components upon start-up * of the out-of-proc server. */ static nsresult RegisterSelfComponents(nsIComponentRegistrar *registrar, const nsModuleComponentInfoEx *aComponents, PRUint32 count) { nsresult rc = NS_OK; const nsModuleComponentInfoEx *info = aComponents; for (PRUint32 i = 0; i < count && NS_SUCCEEDED(rc); i++, info++) { /* skip components w/o a constructor */ if (!info->mConstructor) continue; /* create a new generic factory for a component and register it */ nsIGenericFactory *factory; rc = NS_NewGenericFactoryEx(&factory, info); if (NS_SUCCEEDED(rc)) { rc = registrar->RegisterFactory(info->mCID, info->mDescription, info->mContractID, factory); factory->Release(); } } return rc; } ///////////////////////////////////////////////////////////////////////////// static ipcIService *gIpcServ = nsnull; static const char *g_pszPidFile = NULL; class ForceQuitEvent : public MyEvent { void *handler() { LogFlowFunc(("\n")); gKeepRunning = PR_FALSE; if (g_pszPidFile) RTFileDelete(g_pszPidFile); return NULL; } }; static void signal_handler(int /* sig */) { if (gEventQ && gKeepRunning) { /* post a quit event to the queue */ ForceQuitEvent *ev = new ForceQuitEvent(); ev->postTo(gEventQ); } } int main(int argc, char **argv) { /* * Initialize the VBox runtime without loading * the support driver */ RTR3Init(); static const RTGETOPTDEF s_aOptions[] = { { "--automate", 'a', RTGETOPT_REQ_NOTHING }, { "--auto-shutdown", 'A', RTGETOPT_REQ_NOTHING }, { "--daemonize", 'd', RTGETOPT_REQ_NOTHING }, { "--pidfile", 'p', RTGETOPT_REQ_STRING }, { "--pipe", 'P', RTGETOPT_REQ_UINT32 }, }; bool fDaemonize = false; int daemon_pipe_wr = -1; RTGETOPTSTATE GetOptState; int vrc = RTGetOptInit(&GetOptState, argc, argv, &s_aOptions[0], RT_ELEMENTS(s_aOptions), 1, 0 /*fFlags*/); AssertRC(vrc); RTGETOPTUNION ValueUnion; while ((vrc = RTGetOpt(&GetOptState, &ValueUnion))) { switch (vrc) { case 'a': { /* --automate mode means we are started by XPCOM on * demand. Daemonize ourselves and activate * auto-shutdown. */ gAutoShutdown = true; fDaemonize = true; break; } /* Used together with '-P', see below. Internal use only. */ case 'A': { gAutoShutdown = true; break; } case 'd': { fDaemonize = true; break; } case 'p': { g_pszPidFile = ValueUnion.psz; break; } /* This is just an internal hack for passing the pipe write fd along to the final child. Internal use only. */ case 'P': { daemon_pipe_wr = ValueUnion.u32; break; } case 'h': { RTPrintf("no help\n"); return 1; } case 'V': { RTPrintf("%sr%s\n", RTBldCfgVersion(), RTBldCfgRevisionStr()); return 0; } default: return RTGetOptPrintError(vrc, &ValueUnion); } } #ifdef RT_OS_OS2 /** @todo There is almost no need to make a special case of OS/2 here. Just the execv call needs to be told to create a background process... */ /* nothing to do here, the process is supposed to be already * started daemonized when it is necessary */ NOREF(fDaemonize); #else // !RT_OS_OS2 if (fDaemonize) { /* create a pipe for communication between child and parent */ int daemon_pipe_fds[2] = {-1, -1}; if (pipe(daemon_pipe_fds) < 0) { RTMsgError("pipe() failed (errno = %d)", errno); return 1; } daemon_pipe_wr = daemon_pipe_fds[1]; int daemon_pipe_rd = daemon_pipe_fds[0]; pid_t childpid = fork(); if (childpid == -1) { RTMsgError("fork() failed (errno = %d)", errno); return 1; } if (childpid != 0) { /* we're the parent process */ bool fSuccess = false; /* close the writing end of the pipe */ close(daemon_pipe_wr); /* try to read a message from the pipe */ char msg[10 + 1]; RT_ZERO(msg); /* initialize so it's NULL terminated */ if (read(daemon_pipe_rd, msg, sizeof(msg) - 1) > 0) { if (strcmp(msg, "READY") == 0) fSuccess = true; else RTMsgError("Unknown message from child process (%s)", msg); } else RTMsgError("0 bytes read from child process"); /* close the reading end of the pipe as well and exit */ close(daemon_pipe_rd); return fSuccess ? 0 : 1; } /* we're the child process */ /* Create a new SID for the child process */ pid_t sid = setsid(); if (sid < 0) { RTMsgError("setsid() failed (errno = %d)", errno); return 1; } /* Need to do another for to get rid of the session leader status. * Otherwise any accidentally opened tty will automatically become a * controlling tty for the daemon process. */ childpid = fork(); if (childpid == -1) { RTMsgError("second fork() failed (errno = %d)", errno); return 1; } if (childpid != 0) { /* we're the parent process, just a dummy so terminate now */ exit(0); } /* Close all file handles except for the write end of the pipe. */ int fdMax; struct rlimit lim; if (getrlimit(RLIMIT_NOFILE, &lim) == 0) fdMax = (int)RT_MIN(lim.rlim_cur, 65535); /* paranoia */ else fdMax = 1024; for (int fd = 0; fd < fdMax; fd++) if (fd != daemon_pipe_wr) close(fd); /* Make sure the pipe isn't any of the standard handles. */ if (daemon_pipe_wr <= 2) { if (dup2(daemon_pipe_wr, 3) == 3) { close(daemon_pipe_wr); daemon_pipe_wr = 3; } } /* Redirect the standard handles to NULL by opening /dev/null three times. */ open("/dev/null", O_RDWR, 0); open("/dev/null", O_RDWR, 0); open("/dev/null", O_RDWR, 0); /* * On leopard we're no longer allowed to use some of the core API's * after forking - this will cause us to hit an int3. * So, we'll have to execv VBoxSVC once again and hand it the pipe * and all other relevant options. * * On FreeBSD the fork approach doesn't work. The child fails * during initialization of XPCOM for some unknown reason and * exits making it impossible to autostart VBoxSVC when starting * a frontend (debugger and strace don't contain any useful info). */ const char *apszArgs[7 + 2]; unsigned i = 0; apszArgs[i++] = argv[0]; apszArgs[i++] = "--pipe"; char szPipeArg[32]; RTStrPrintf(szPipeArg, sizeof(szPipeArg), "%d", daemon_pipe_wr); apszArgs[i++] = szPipeArg; if (g_pszPidFile) { apszArgs[i++] = "--pidfile"; apszArgs[i++] = g_pszPidFile; } if (gAutoShutdown) apszArgs[i++] = "--auto-shutdown"; apszArgs[i++] = NULL; Assert(i <= RT_ELEMENTS(apszArgs)); execv(apszArgs[0], (char * const *)apszArgs); exit(126); } #endif // !RT_OS_OS2 nsresult rc; do { rc = com::Initialize(); if (NS_FAILED(rc)) { RTMsgError("Failed to initialize XPCOM! (rc=%Rhrc)\n", rc); break; } nsCOMPtr registrar; rc = NS_GetComponentRegistrar(getter_AddRefs(registrar)); if (NS_FAILED(rc)) { RTMsgError("Failed to get component registrar! (rc=%Rhrc)", rc); break; } registrar->AutoRegister(nsnull); rc = RegisterSelfComponents(registrar, components, NS_ARRAY_LENGTH (components)); if (NS_FAILED(rc)) { RTMsgError("Failed to register server components! (rc=%Rhrc)", rc); break; } /* get the main thread's event queue (afaik, the dconnect service always * gets created upon XPCOM startup, so it will use the main (this) * thread's event queue to receive IPC events) */ rc = NS_GetMainEventQ(&gEventQ); if (NS_FAILED(rc)) { RTMsgError("Failed to get the main event queue! (rc=%Rhrc)", rc); break; } nsCOMPtr ipcServ (do_GetService(IPC_SERVICE_CONTRACTID, &rc)); if (NS_FAILED(rc)) { RTMsgError("Failed to get IPC service! (rc=%Rhrc)", rc); break; } NS_ADDREF(gIpcServ = ipcServ); LogFlowFunc(("Will use \"%s\" as server name.\n", VBOXSVC_IPC_NAME)); rc = gIpcServ->AddName(VBOXSVC_IPC_NAME); if (NS_FAILED(rc)) { LogFlowFunc(("Failed to register the server name (rc=%Rhrc (%08X))!\n" "Is another server already running?\n", rc, rc)); RTMsgError("Failed to register the server name \"%s\" (rc=%Rhrc)!\n" "Is another server already running?\n", VBOXSVC_IPC_NAME, rc); NS_RELEASE(gIpcServ); break; } { /* setup signal handling to convert some signals to a quit event */ struct sigaction sa; sa.sa_handler = signal_handler; sigemptyset(&sa.sa_mask); sa.sa_flags = 0; sigaction(SIGINT, &sa, NULL); sigaction(SIGQUIT, &sa, NULL); sigaction(SIGTERM, &sa, NULL); sigaction(SIGTRAP, &sa, NULL); } { char szBuf[80]; int iSize; iSize = RTStrPrintf(szBuf, sizeof(szBuf), VBOX_PRODUCT" XPCOM Server Version " VBOX_VERSION_STRING); for (int i = iSize; i > 0; i--) putchar('*'); RTPrintf("\n%s\n", szBuf); RTPrintf("(C) 2008-" VBOX_C_YEAR " " VBOX_VENDOR "\n" "All rights reserved.\n"); #ifdef DEBUG RTPrintf("Debug version.\n"); #endif } if (daemon_pipe_wr >= 0) { RTPrintf("\nStarting event loop....\n[send TERM signal to quit]\n"); /* now we're ready, signal the parent process */ write(daemon_pipe_wr, "READY", strlen("READY")); } else RTPrintf("\nStarting event loop....\n[press Ctrl-C to quit]\n"); if (g_pszPidFile) { RTFILE hPidFile = NIL_RTFILE; vrc = RTFileOpen(&hPidFile, g_pszPidFile, RTFILE_O_WRITE | RTFILE_O_CREATE_REPLACE | RTFILE_O_DENY_NONE); if (RT_SUCCESS(vrc)) { char szBuf[32]; const char *lf = "\n"; RTStrFormatNumber(szBuf, getpid(), 10, 0, 0, 0); RTFileWrite(hPidFile, szBuf, strlen(szBuf), NULL); RTFileWrite(hPidFile, lf, strlen(lf), NULL); RTFileClose(hPidFile); } } // Increase the file table size to 10240 or as high as possible. struct rlimit lim; if (getrlimit(RLIMIT_NOFILE, &lim) == 0) { if ( lim.rlim_cur < 10240 && lim.rlim_cur < lim.rlim_max) { lim.rlim_cur = RT_MIN(lim.rlim_max, 10240); if (setrlimit(RLIMIT_NOFILE, &lim) == -1) RTPrintf("WARNING: failed to increase file descriptor limit. (%d)\n", errno); } } else RTPrintf("WARNING: failed to obtain per-process file-descriptor limit (%d).\n", errno); PLEvent *ev; while (gKeepRunning) { gEventQ->WaitForEvent(&ev); gEventQ->HandleEvent(ev); } /* stop accepting new events. Clients that happen to resolve our * name and issue a CreateInstance() request after this point will * get NS_ERROR_ABORT once we hande the remaining messages. As a * result, they should try to start a new server process. */ gEventQ->StopAcceptingEvents(); /* unregister ourselves. After this point, clients will start a new * process because they won't be able to resolve the server name.*/ gIpcServ->RemoveName(VBOXSVC_IPC_NAME); /* process any remaining events. These events may include * CreateInstance() requests received right before we called * StopAcceptingEvents() above. We will detect this case below, * restore gKeepRunning and continue to serve. */ gEventQ->ProcessPendingEvents(); RTPrintf("Terminated event loop.\n"); } while (0); // this scopes the nsCOMPtrs NS_IF_RELEASE(gIpcServ); NS_IF_RELEASE(gEventQ); /* no nsCOMPtrs are allowed to be alive when you call com::Shutdown(). */ LogFlowFunc(("Calling com::Shutdown()...\n")); rc = com::Shutdown(); LogFlowFunc(("Finished com::Shutdown() (rc=%Rhrc)\n", rc)); if (NS_FAILED(rc)) RTMsgError("Failed to shutdown XPCOM! (rc=%Rhrc)", rc); RTPrintf("XPCOM server has shutdown.\n"); if (g_pszPidFile) RTFileDelete(g_pszPidFile); /* close writing end of the pipe as well */ if (daemon_pipe_wr >= 0) close(daemon_pipe_wr); return 0; }